Food can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.Here are some examples of food-to-food cross-contamination: 1  In a refrigerator, meat drippings from raw meat stored on a top shelf might drip onto cooked vegetables placed on lower shelf.ood can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.
Best Answer: Putting batteries in the freezer or refrigerator doesn't necessarily prolong their life. Alkaline batteries stored at room temperature self discharge at a rate of less than two percent per year. So normally refrigerating or freezing them will only help maintain their charge by a tiny amount.
This is important because a discharged battery will freeze -- a charged battery will not freeze. A battery that has been frozen is very likely a dead battery. Note that a car battery rarely freezes because a car battery is rarely fully discharged.A car battery will freeze if it is allowed to get cold enough when discharged. Let's examine why my customers need to worry about discharged batteries over the winter.Lead-acid batteries contain a solution of sulfuric acid (H 2 SO 4) and water -- the solution is referred to as the battery's electrolyte. battery that has been frozen is very likely a dead battery. Note that a car battery rarely freezes because a car battery is rarely fully discharged. A car battery will freeze if it is allowed to get cold enough when discharged. Let's examine why my customers need to worry about discharged batteries over the winter.